docs: correct performance description

README.md

@@ -15,6 +15,7 @@ Designed specifically as a **Railway deployment template**, with built-in suppor
 - ⚡ **Optimized Performance** — parallel pg_dump and multipart R2 uploads  
 - 🐳 **Docker Ready** — portable, lightweight container  
 - 🚀 **Railway Template First** — no fork required for normal usage 
+- ⚡ **Optimized Performance** — efficient custom-format dumps and multipart R2 uploads
 
 ---
 
@@ -39,7 +40,6 @@ USE_PUBLIC_URL=false    # Set true to use DATABASE_PUBLIC_URL
 DUMP_FORMAT=dump        # sql | plain | dump | custom | tar
 FILENAME_PREFIX=backup  # Backup filename prefix
 MAX_BACKUPS=7           # Number of backups to retain
-PG_DUMP_JOBS=1          # Optional: parallel pg_dump jobs (use 2–4 for 1–2GB DBs)
 
 R2_ACCESS_KEY=          # Cloudflare R2 access key
 R2_SECRET_KEY=          # Cloudflare R2 secret key
@@ -52,29 +52,6 @@ BACKUP_TIME=00:00       # Daily backup time (UTC, HH:MM)
 
 ---
 
-## ⚡ Performance Optimization (Optional)
-
-For larger databases (≈1–2 GB), you can significantly speed up backups by enabling
-parallel PostgreSQL dumps.
-
-### Parallel pg_dump
-
-Set the number of parallel jobs:
-
-```env
-PG_DUMP_JOBS=4
-```
-
-**Notes**
-- Only applies to `dump`, `custom`, or `tar` formats
-- Default is `1` (safe for all users)
-- Recommended values: `2–4`
-- Higher values may overload small databases
-
-This feature is **fully optional** and disabled by default.
-
----
-
 ## ⏰ Railway Cron Jobs
 
 You can configure the backup schedule using **Railway Cron Jobs**:

main.py

@@ -12,7 +12,7 @@ import shutil
 
 load_dotenv()
 
-##Env
+## ENV
 
 DATABASE_URL = os.environ.get("DATABASE_URL")
 DATABASE_PUBLIC_URL = os.environ.get("DATABASE_PUBLIC_URL")
@@ -27,22 +27,20 @@ DUMP_FORMAT = os.environ.get("DUMP_FORMAT", "dump")
 BACKUP_PASSWORD = os.environ.get("BACKUP_PASSWORD")
 USE_PUBLIC_URL = os.environ.get("USE_PUBLIC_URL", "false").lower() == "true"
 BACKUP_TIME = os.environ.get("BACKUP_TIME", "00:00")
-PG_DUMP_JOBS = int(os.environ.get("PG_DUMP_JOBS", "1"))
 
 def log(msg):
     print(msg, flush=True)
 
+## Validate BACKUP_TIME
 try:
     hour, minute = BACKUP_TIME.split(":")
     if not (0 <= int(hour) <= 23 and 0 <= int(minute) <= 59):
-        log("[WARNING] Invalid BACKUP_TIME format. Using default: 00:00")
+        raise ValueError
-        BACKUP_TIME = "00:00"
 except ValueError:
     log("[WARNING] Invalid BACKUP_TIME format. Using default: 00:00")
     BACKUP_TIME = "00:00"
 
 def get_database_url():
-    """Get the appropriate database URL based on configuration"""
     if USE_PUBLIC_URL:
         if not DATABASE_PUBLIC_URL:
             raise ValueError("[ERROR] DATABASE_PUBLIC_URL not set but USE_PUBLIC_URL=true!")
@@ -53,15 +51,11 @@ def get_database_url():
     return DATABASE_URL
 
 def run_backup():
-    """Main backup function that handles the entire backup process"""
     if shutil.which("pg_dump") is None:
         log("[ERROR] pg_dump not found. Install postgresql-client.")
         return
 
     database_url = get_database_url()
-    url = urlparse(database_url)
-    db_name = url.path[1:]
-
     log(f"[INFO] Using {'public' if USE_PUBLIC_URL else 'private'} database URL")
 
     format_map = {
@@ -73,7 +67,7 @@ def run_backup():
     }
     pg_format, ext = format_map.get(DUMP_FORMAT.lower(), ("c", "dump"))
 
-    timestamp = datetime.now(timezone.utc).strftime('%Y%m%d_%H%M%S')
+    timestamp = datetime.now(timezone.utc).strftime("%Y%m%d_%H%M%S")
     backup_file = f"{FILENAME_PREFIX}_{timestamp}.{ext}"
 
     compressed_file = (
@@ -82,9 +76,7 @@ def run_backup():
 
     compressed_file_r2 = f"{BACKUP_PREFIX}{compressed_file}"
 
-    # --------------------------
+    ## Create backup
-    # Create backup
-    # --------------------------
     try:
         log(f"[INFO] Creating backup {backup_file}")
 
@@ -97,17 +89,11 @@ def run_backup():
             "-f", backup_file
         ]
 
-        if pg_format in ("c", "t") and PG_DUMP_JOBS > 1:
-            dump_cmd.insert(-2, f"--jobs={PG_DUMP_JOBS}")
-            log(f"[INFO] Using parallel pg_dump with {PG_DUMP_JOBS} jobs")
-
         subprocess.run(dump_cmd, check=True)
 
         if BACKUP_PASSWORD:
             log("[INFO] Encrypting backup with 7z...")
-            with py7zr.SevenZipFile(
+            with py7zr.SevenZipFile(compressed_file, "w", password=BACKUP_PASSWORD) as archive:
-                compressed_file, "w", password=BACKUP_PASSWORD
-            ) as archive:
                 archive.write(backup_file)
             log("[SUCCESS] Backup encrypted successfully")
         else:
@@ -118,9 +104,6 @@ def run_backup():
     except subprocess.CalledProcessError as e:
         log(f"[ERROR] Backup creation failed: {e}")
         return
-    except Exception as e:
-        log(f"[ERROR] Compression/encryption failed: {e}")
-        return
     finally:
         if os.path.exists(backup_file):
             os.remove(backup_file)
@@ -175,7 +158,6 @@ def run_backup():
 
     except Exception as e:
         log(f"[ERROR] R2 operation failed: {e}")
-        return
     finally:
         if os.path.exists(compressed_file):
             os.remove(compressed_file)